Please select the size from the item drop down menu. (If your kid is chubby, we recommend choosing a larger size, thanks =] )
There is 2-3% difference according to manual measurement. please check the measurement chart carefully before you buy the item. (1 inch = 2.54 cm)
Hand wash the item in cold water, add a little bit baby detergent if it is too dirty, gently roll in a towel to absorb the excess moisture and then lay flat to dry.